When must defense counsel move for mistrial during voir dire? State v. Courtney Explained

The Utah Court of Appeals in State v. Courtney addressed the critical timing requirements for mistrial motions when prejudicial information emerges during jury selection. The case provides important guidance on defense counsel’s obligations to protect a client’s constitutional right to an impartial jury.

Background and Facts

Carl Mack Courtney was charged with distribution of a controlled substance. During voir dire, when defense counsel asked if any prospective jurors knew him or his client, one juror responded that she had “affiliations” with defendant from her time “serving as an agent for the Weber-Morgan Narcotics Strike Force.” This statement strongly suggested defendant had prior drug-related law enforcement contacts. Defense counsel discussed the issue at sidebar with the court but failed to move for mistrial before the jury was sworn. After the jury was empaneled, counsel finally moved for mistrial, which the trial court denied as untimely.

Key Legal Issues

The case presented issues of ineffective assistance of counsel and the timing requirements for mistrial motions during voir dire. Specifically, the court examined whether defense counsel’s failure to move for mistrial before jury selection was completed constituted deficient performance that prejudiced the defendant.

Court’s Analysis and Holding

The Court of Appeals found defense counsel’s performance deficient under the Strickland standard. The court explained that counsel could have moved for mistrial during jury selection under Rule 24 of the Utah Rules of Criminal Procedure, which allows new trial motions “in the interest of justice” when error has a substantial adverse effect on a party’s rights. The court rejected the State’s argument that counsel was limited to challenging individual jurors under Rule 18.

Regarding prejudice, the court found the prospective juror’s statement suggested defendant had repeatedly engaged in drug-related activities, improperly corroborating trial testimony. The court noted that even the trial judge recognized this created a “pretty significant situation.” The appellate court concluded there was a reasonable likelihood the trial result would have been different absent the prejudicial comment.

Practice Implications

This decision underscores the importance of immediate action when prejudicial information emerges during voir dire. Defense counsel must be prepared to move for mistrial before the jury is sworn, as post-empanelment motions face heightened scrutiny for untimeliness. The case also demonstrates that trial courts have broad discretion to manage proceedings and preserve trial integrity, including the power to declare mistrial sua sponte when obvious jury taint occurs.